when compiled with "pcc -E" just busy-loops as the AB->A(B)->AB is recursive, but
I think it should cease operations as per C99 6.10.3.4 ?

Description

the following code example
#define A(x) A ## x
#define AB A(B)
AB
when compiled with "pcc -E" just busy-loops as the AB->A(B)->AB is recursive, but
I think it should cease operations as per C99 6.10.3.4 ?